20981037

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{359}}^1$

素因数の和:414

約数の個数: 48

約数和(自身を含む): 36771840

約数和(自身を除く): 15790803

約数列:

[1, 3, 7, 11, 21, 23, 33, 69, 77, 121, 161, 231, 253, 359, 363, 483, 759, 847, 1077, 1771, 2513, 2541, 2783, 3949, 5313, 7539, 8257, 8349, 11847, 19481, 24771, 27643, 43439, 57799, 58443, 82929, 90827, 130317, 173397, 272481, 304073, 635789, 912219, 999097, 1907367, 2997291, 6993679, 20981037]

約数ペア:

[(1, 20981037), (3, 6993679), (7, 2997291), (11, 1907367), (21, 999097), (23, 912219), (33, 635789), (69, 304073), (77, 272481), (121, 173397), (161, 130317), (231, 90827), (253, 82929), (359, 58443), (363, 57799), (483, 43439), (759, 27643), (847, 24771), (1077, 19481), (1771, 11847), (2513, 8349), (2541, 8257), (2783, 7539), (3949, 5313)]